Attachment for boilers



May 1s 1926.

'155849801 w. R. FENDER ATTACHMENT Fon BOILERS Filed April 5, 1925 3sheets-sheet 1 fm T Z WERE/V054? May 18,192@ .1,584,801

l W. R. PENDER ATTACHMENT FOR BoILERs Filed April, 1925 3 Sheets-Sheet 2--Illllv fr'g . Il@ "Hangul" FENDER ATTACHMENT FOR BOILERS May 18 ,19m

3 Sheets-Sheet 5 a proper mixture of Patented May 18, 1926.

WINNZEIELD RUSSEL FENDER, 0F HOUSTON, TEXAS.

Ar'rAeHMENrf Application mea April 3,

This invention relates to attachments for boilers, and more particularlyto air supply indicators for oil tired boilers.

In the present invention, I provide an attachment adapted to be placedin the gas outlet of an oil tired 'boiler by means ot whichtheoperatormay determine whether air and oil is being fed to the boiler.

The attachment consists of a light adapt'- ed to be arranged on oneside'of the outlet passage, and a mirror on the opposite side inalinement therewith, together with means for permitting the operator toobserve the reflection of the light in the inirror and thus determinethe character oi' the gases passing through the outlet passage.

An object of the inventionis the provision of a mirror that ma beadjusted without moving the casing of the attachment to cure any detectsinthe installation of the deviceor "take care of any7 movement of theboiler walls. l

'A further object of the invention is the provision ot means forcleaning the light and mirror to prevent accumulation of soot thereon.

In the accompanying drawings, I have shown several embodiments of theinvention. In this showing:

Figure 1 -is a horizontal sectional view of' the gas outlet of a boilershowing the invention applied,

Figure 2 is a front elevation of the mirror casing detached,

Figure 3 is a vertical sectional view on line 3 3 of Figure 2,

Figure 4 is a horizontal sectional view on line 4 4 of Figure 3,

Figure 5 is a view similar to Figure 1 showing the method of installingthe apparatus on a pair of boilers forming a battery, y Figure 6 is asimilarview showing the device applied to the smoke stack,

Figure 7 is a detail sectional view on line 7-7 ot Figure 6,

v Figure 8 is a similar view on line 8-8 of Figure 1, and

Figure 9 is a section taken on line 9-9 of Figure 5.

Referring to Figures 1 to 4 of the drawings, the reference numeral 1designates the walls of a boiler separated from each other to provide aspace. The attachment formingthe subject matter of the present inven--ron' Bomans'.

1923. Serial No. 629,703.

Y at an angle of 45 degrees to the axis of the pipe and forming ineii'ect, an elbow. 'The opposite end of the mirror casing is threadedfor the reception of a sight tube 5. A mirror 6 is mounted in the mirrorcasing in a holder 7, the mirror being retained in the holder by meansof lugs 8. A threaded stem 9 extends from the holder through the wall 4and a nut 10 is mounted thereon. The

threaded stem is best arranged substantially centrally of the mirrorholder. The wall 10 is :further provided with a .plurality of threadedopenings for the reception ot' lugs 11 which bear against the rear faceof the v mirror holder to permit adjustment thereof.

The sight tube 5 is provided' with a plain glass or lens 12 of slightlysmaller diameter than the diameter of the-tube (see Figure 4). Thisglass is retained between substantially L.shaped brackets 13 and 14which are secured to the walls of the tube by means ofbolts 15. Oppositethe pipe 2, a second pipe 16 is mounted in an opening in the wall of theboiler and,a lamp 17 is arranged within this pipe. As shown, the lamp ismounted in a socket 17 arranged on the end of a f pipe or conduit 18.The conduit is supported centrally of the pipe by suitable supportingmembers 19. Electric feed wires 20 extend through the conduit to thelamp socket. The end of this pipe is closed by a cap 21 having aplurality of openings 22 formed therein (see Figure 7).

In Figure 5- of the drawings, I have shown the attachment applied' totwo boilers arranged in series. The boilers are provided with outer,walls 23 and are separated from each other by an inner wall 24. Theinner wall is provided with two transverse openirgs 25 each having apipe 26 arranged therein, and is further provided with a longitudinalopening extending through the back of the boiler to the openings 25. Thepipe 16 is arranged in this opening and the lamps 17 are supported inthe pipes in the manner described, each being disposed in alinem-nt withone of the transverse open'- ings 25, as shown in Fig. 9. Mirrors arearranged in the two outer walls 23 in alinement with the openings 25,the construction of the mirror support being the same as in the form ofthe invention heretofore described. 4

In Figure G of the drawings, the attachment is shown applied to thesmoke stack 27 of a boiler and as shown, the smoke stack communicateswith the gas outlet through passages 28 and is provided with a damper 29in the usual manner. The light 17 is supported in a tube 30, arranged inan opening in thel stack and the mirror support yis likewise arranged inan opening in the stack opposite the lamp support.

The operation of the. device will be apparent from the foregoingdescription. The mirror and light are set in the wall of the boiler onopposite sides near the Hue gas outlet and the gas passing between themirror and light absorb or deiect the rays of light from the lightelement. The amount ot' this deflection is observed in the mirror and asthe deflection bearsa certain ratio to the required air supply, theproper proportions can be determined by this observation. By observingthe density or haze point ot' the gas leaving the boiler, the conditionsunder which the boiler is operating may be readily determined. It iswell known that when the minimum air supply has been reached, a smallamount of haze will appear at the gas outlet. A bright light on themirror indicates excess air and a dark mirror will indicate insutlicientair. The minimum air supply to support complete combustion has beenreached when a red light is reflected on the'mirror.

By providing a glass or lens 12 in the tube slightly smaller in diameterthan the tube, the passage of air through the sight tube and the mirrorcasing is permitted at all times which keeps the mirror clean. Likewise,the provision of holes 22 in the cap 21 permits a slight amount of airto pass through the tube 16 and keep the lamp clean.

he mirror may be adjusted by means of the screws or studs 11 tocompensate for mis-alinement in the installation or morement of theboiler walls.

By providing an attachment -for each boiler, improper conditions may beimmediately located where a number oi boilers are connected to the samesmoke stack. Under ordinary conditions, one boiler of a series may getout of adjustn'ient and produce considerable loss of fuel oil before itcan be dctermined which boiler is causing the trouble.

It is to be understood that the forms ol' my invention herewith shownand described are to be taken as preferred examples ot the same and thatVarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subjoined claim.

Having thus described my invention, l claim:

An attachment for oil tired burners a gas outlet provided withoppositely arranged alined horizontal openings communicating therewithcomprising a lamp supporting member arranged in one ot' said openings, amirror casing arranged in the other otl said openings, a mirror holdermounted in said casing, a threaded pin carried by said mirror holdersubstantially cent-rally thereof and projecting loosely through saidcasing, a nut mounted on said pin, adjusting means carried by saidcasing and contacting with the outer portions of said mirror holder, amirror mounted in said holder and adapted to reflect rays of light froma lamp in said lamp supporting member and a sight tube communicatingwith said mirror casing.

In testimony whereof, I aiiix my signature.

VINN FIELD RUSSEL FENDER.

having

